<?php
class Email
{
  /* Public Variables */
  //邮箱服务器端口
  var $smtp_port;
  //超时时间
  var $time_out;
  //hello $host_name这种效果
  var $host_name;
  //日志文件
  var $log_file;
  //主机
  var $relay_host;
  //是否调试
  var $debug;
  //逻辑值真假
  var $auth;
  //用户名
  var $user;
  //用户密码
  var $pass;
  
  /* Private Variables */
  //逻辑值，fsockopen函数的返回值
  var $sock;
 
  /* Constractor */
  function Email($relay_host = "", $smtp_port = 25,$auth = false,$user,$pass)
  {
	  $this->debug = FALSE;
	  $this->smtp_port = $smtp_port;
	  $this->relay_host = $relay_host;
	  $this->time_out = 30; //is used in fsockopen()
	  $this->auth = $auth;//auth
	  $this->user = $user;
	  $this->pass = $pass;
	  $this->host_name = "localhost"; //is used in HELO command
	  $this->log_file = "";
	  $this->sock = FALSE;		  
  }
  
  /* Main Function */
  function sendmail($to,$from,$subject = "",$body = "",$mailtype,$cc = "",$bcc ="",$additional_headers = "")
  {
	  $mail_from = $this->get_address($this->strip_comment($from));
	  $body = preg_replace("/(^|(\r\n))(\.)/", "\1.\3", $body);
	  $header = "MIME-Version:1.0\r\n";
	  if($mailtype=="HTML")
	  {
		$header .= "Content-Type:text/html\r\n";
	  }
	  
	  $header .= "To: ".$to."\r\n";
	  if ($cc != "")
	  {
		 $header .= "Cc: ".$cc."\r\n";
	  }
	  $formname = iconv("UTF-8", "GBK//IGNORE", "秀当网");
	  $header .= "From: {$formname}<".$from.">\r\n";
	  $header .= "Subject: ".$subject."\r\n";
	  $header .= $additional_headers;
	  $header .= "Date: ".date("r")."\r\n";
	  $header .= "X-Mailer:By Redhat (PHP/".phpversion().")\r\n";
	  list($msec, $sec) = explode(" ", microtime());
	  $header .= "Message-ID: <".date("YmdHis", $sec).".".($msec*1000000).".".$mail_from.">\r\n";
	  $TO = explode(",", $this->strip_comment($to));
	  if ($cc != "")
	  {
		  $TO = array_merge($TO, explode(",", $this->strip_comment($cc)));
	  }
	  
	  if ($bcc != "")
	  {
		  $TO = array_merge($TO, explode(",", $this->strip_comment($bcc)));
	  }
	  
	  $sent = TRUE;
	  
	  foreach ($TO as $rcpt_to)
	  {
		 $rcpt_to = $this->get_address($rcpt_to);
		  if (!$this->smtp_sockopen($rcpt_to))
		  {
			 $this->log_write("Error: Cannot send email to ".$rcpt_to."\n");
			 $sent = FALSE;
			 continue;
		  }
	  
		  if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body))
		  {
			  $this->log_write("E-mail has been sent to <".$rcpt_to.">\n");
		  } 
		  else
		  {
			 $this->log_write("Error: Cannot send email to <".$rcpt_to.">\n");
			 $sent = FALSE;
		  }
	  
			 fclose($this->sock);
			 $this->log_write("Disconnected from remote host\n");
	  }
	  
	  return $sent;
  }
  
  /* Private Functions */
  function smtp_send($helo, $from, $to, $header, $body = "")
  {
	  if (!$this->smtp_putcmd("HELO", $helo)) 
	  {
		 return $this->smtp_error("sending HELO command");
	  }
	  
	  #auth
	  
	  if($this->auth)
	  {
		  if (!$this->smtp_putcmd("AUTH LOGIN", '')) 
		  {
			return $this->smtp_error("sending HELO command");
		  }

		  if (!$this->smtp_putcmd("", base64_encode($this->user)))
		  {
			return $this->smtp_error("sending HELO command");
		  }
		  
		  if (!$this->smtp_putcmd("", base64_encode($this->pass)))
		  {
			return $this->smtp_error("sending HELO command");
		  }
	  
	  }
	  
	  #
	  
	  if (!$this->smtp_putcmd("MAIL", "FROM:<".$from.">"))
	  {
		 return $this->smtp_error("sending MAIL FROM command");
	  }
	  
	  if (!$this->smtp_putcmd("RCPT", "TO:<".$to.">")) 
	  {
		  return $this->smtp_error("sending RCPT TO command");
	  }
	  
	  if (!$this->smtp_putcmd("DATA")) 
	  {
		  return $this->smtp_error("sending DATA command");
	  }
	  
	  if (!$this->smtp_message($header, $body)) 
	  {
		  return $this->smtp_error("sending message");
	  }
	  
	  if (!$this->smtp_eom()) 
	  {
		  return $this->smtp_error("sending <CR><LF>.<CR><LF> [EOM]");
	  }
	  
	  if (!$this->smtp_putcmd("QUIT")) 
	  {
		 return $this->smtp_error("sending QUIT command");
	  }
	  
	  return TRUE;
  }
  
  function smtp_sockopen($address)
  {
	  if ($this->relay_host == "") 
	  {
		  return $this->smtp_sockopen_mx($address);
	  } 
	  else
	  {
		  return $this->smtp_sockopen_relay();
	  }
  }
  
  function smtp_sockopen_relay()
  {
	  $this->log_write("Trying to ".$this->relay_host.":".$this->smtp_port."\n");
	  $this->sock = @fsockopen($this->relay_host, $this->smtp_port, $errno, $errstr, $this->time_out);
	  if (!($this->sock && $this->smtp_ok())) 
	  {
		 $this->log_write("Error: Cannot connenct to relay host ".$this->relay_host."\n");
		 $this->log_write("Error: ".$errstr." (".$errno.")\n");
		 return FALSE;
	  }
	  
	  $this->log_write("Connected to relay host ".$this->relay_host."\n");
	  return TRUE;
  }
  
   
  
  function smtp_sockopen_mx($address)
  {
	  $domain = preg_replace("/^.+@([^@]+)$/", "\1", $address);
	  if (!@getmxrr($domain, $MXHOSTS))
	  {
		  $this->log_write("Error: Cannot resolve MX \"".$domain."\"\n");
		  return FALSE;
	  }
	  
	  foreach ($MXHOSTS as $host)
	  {
		 $this->log_write("Trying to ".$host.":".$this->smtp_port."\n");
		 $this->sock = @fsockopen($host, $this->smtp_port, $errno, $errstr, $this->time_out);
		 
		  if (!($this->sock && $this->smtp_ok()))
		  {
			 $this->log_write("Warning: Cannot connect to mx host ".$host."\n");
			 $this->log_write("Error: ".$errstr." (".$errno.")\n");
			 continue;
		  }
		  
		  $this->log_write("Connected to mx host ".$host."\n");
		  return TRUE;
	  }
	  
	  $this->log_write("Error: Cannot connect to any mx hosts (".implode(", ", $MXHOSTS).")\n");
	  return FALSE;
  }
  
   
  
  function smtp_message($header, $body)
  {
	  fputs($this->sock, $header."\r\n".$body);
	  $this->smtp_debug("> ".str_replace("\r\n", "\n"."> ", $header."\n> ".$body."\n> "));
	  return TRUE;
  }
  
   
  
  function smtp_eom()
  {
	  fputs($this->sock, "\r\n.\r\n");
	  $this->smtp_debug(". [EOM]\n");
	  return $this->smtp_ok();
  }
  
   
  
  function smtp_ok()
  {
	  $response = str_replace("\r\n", "", fgets($this->sock, 512));
	  $this->smtp_debug($response."\n");
	  if (!preg_match("/^[23]/", $response)) 
	  {
		  fputs($this->sock, "QUIT\r\n");
		  fgets($this->sock, 512);
		  $this->log_write("Error: Remote host returned \"".$response."\"\n");
		  return FALSE;
	  }
	  return TRUE;
  }
  
  function smtp_putcmd($cmd, $arg = "") 
  {
	  if ($arg != "") 
	  {
		 if($cmd=="") $cmd = $arg;
		 else $cmd = $cmd." ".$arg;
	  }
	  
	  fputs($this->sock, $cmd."\r\n");
	  $this->smtp_debug("> ".$cmd."\n");
	  return $this->smtp_ok();
  }
  
  function smtp_error($string)
  {
	  $this->log_write("Error: Error occurred while ".$string.".\n");
	  return FALSE;
  }
  
  function log_write($message)
  {
	  $this->smtp_debug($message);
	  if ($this->log_file == "") 
	  {
		 return TRUE;
	  }
	  
	  $message = date("M d H:i:s ").get_current_user()."[".getmypid()."]: ".$message;
	  if (!@file_exists($this->log_file) || !($fp = @fopen($this->log_file, "a"))) 
	  {
		 $this->smtp_debug("Warning: Cannot open log file \"".$this->log_file."\"\n");
		 return FALSE;;
	  }
	  
	  flock($fp, LOCK_EX);
	  fputs($fp, $message);
	  fclose($fp);
	  return TRUE;
  }
  
  
  function strip_comment($address)
  {
	  $comment = "/\([^()]*\)/";
	  while (preg_match($comment, $address))
	  {
		 $address = preg_replace($comment, "", $address);
	  }
	  return $address;
  }
  
  
  function get_address($address)
  {
	  $address = preg_replace("/([ \t\r\n])+/", "", $address);
	  $address = preg_replace("/^.*<(.+)>.*$/", "\1", $address);
	  return $address;
  }
  
  function smtp_debug($message)
  {
	  if ($this->debug)
	  {
		 echo $message;
	  }
  }

}
?>
